/Engine/Source/Runtime/Engine/Public/AudioDevice.h
Returns true if a sound wave should be decompressed.
bool ShouldUseRealtimeDecompression ( bool bForceFullDecompression, const [FSoundGroup](API\Runtime\Engine\Sound\FSoundGroup) & SoundGroup, [USoundWave](API\Runtime\Engine\Sound\USoundWave) * SoundWave, float CompressedDurationThreshold ) const